This is an exploration on the combination of the people’s movement and music. The audience can use their phone’s flashlight to draw straight lines on the screen. When they swing their hands, legs, and different parts of the body on these lines, the lines will spring on
the screen and generate sound depends on the position they are set. Tone frequency is gradually increasing from the lower-left corner to the higher-right corner in the screen so that each line has its unique sound. The audience can use different movement and posture to play music.